单项选择题
oil can()
A.油壶
B.油浓度表
C.油罐
D.油泵
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单项选择题
propeller()
A.螺旋桨
B.叶桨
C.舵
D.叶轮
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单项选择题
scraper()
A.扳手
B.刮刀
C.羊角锤
D.锤子
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